Wes Welker is set to hit the free-agent market after a two-year stint with the Denver Broncos. Exactly how effective he can be after a down season in 2014 or whether he plans to play at all remains to be seen.

Projecting how top collegiate football players will transition to the NFL is a tough endeavor. To make the process of talent evaluation more effective, it’s important to recognize what situation a player performs the best in. That especially rings true for the NFL draft’s top running backs.